title: Planetary science. Price tags for planet missions force NASA to lower its sights.
authors.forename: Richard A
authors.initials: RA
authors.lastname: Kerr
mesh_terms: D002017:Budgets; D003365:Costs and Cost Analysis; D018559:Exobiology / Q000191:economics*; D016083:Planets; D013026:Space Flight / Q000191:economics*; D014481:United States; D018557:United States National Aeronautics and Space Administration / Q000191:economics*